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P. M. ANDERSON. RECORDING INSTRUMENT? APPLICATION FILED 1^N.16l9|*7` Patented Aug. 26, 1919.

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' .use of my improved recordirg In this meter, there are two similar tiltingv receptacles A each of which turns, whenv NITED STATES I nrENr OFFICE- PETER M. ANDERSON, 0F WASHINGTON, DISTRICT 0F COLUMBIA, ASSIGNOR TO JOSEPH S. LOVERING W'HARTON, WILLIAMS. HALLOWELL, AND JOHN C. JONES, ALL OF PHILADELPHIA, PENNSYLVANIA, DOING BUSINESS UNDER THE NAME OF HARRISON SAFETY BOILER WORKS. v

RECORDING INSTRUMENT.

To all whom it may concern:

Be it'known that I, PETER M. ANDERspN, a citizen of the United States of America,

and a resident of Washington, District of Columbia, have invented certain new and useful Improvements in Recording Instruments,'of whi ch the following is a true and exact description, reference bein had to the accom anying drawings, which orm a part thereo?. y

My present invention relates to recording instruments and particularly to recording instruments of the type in which a recordlng pen er marker 1s employed to make, on a traveling record surface having a timed movement, a record of the frequencyof occurrence of an intermittently occurring event; and the object of the invention 'is to provide means for giving the pen or other marking point. a certain novel movement relative to the record surface, for the purpose of. Creatin a resultantv record which will show the requenc of the happenings re'- corded in a desirab e,- clear and legible manner. The various features of novelty vwhich characterize my invention are pointed outl with pa-rticularity in the clairnannexed to and forming a part of this speclcation. For a better understanding of 'the invention, however, and the advantages possessed by it, reference should be had to the accompanying drawings, in which I have, illustrated a preferred embodimentof my invention.

Of the drawings:

Figure 1 is an elevation of a portion of a meter equipped with my improved recording device;

Fig. 2 is a partial elevation taken at right an les to Fig. 1;

ig. 3 is an enlarged view of aportion of a recording mechanism proper shown in line 4--4 of Flg. 3; and

Fig. 5 is a developed view of a cam emplmyed. n the drawings, I have illustrated the instrument in connection with the meter of the eneral t pe shown in my co-(pending app ication, erial No; 86,324, file March 23, 1916.

vism proper.

Specication of Letten Patent. Patented Aug- 26, 1919 Appia-.atan and January 16, 1917. serial No. 142,314. I

filled, about its supporting axis A2 to discharge. To register and record the number of tlmes the receptacles fill and empty, a rock shaft B is journaled in the casing of the meter and is Iprovided internally of the casing with oppositely extending arms hand bucket is em ty, it swings back into the position shown. he shaft B and parts carrled thereby will remain in the dotted line position until the right hand bucket is filled and turns into the discharge position. When thls occurs, the projections A3 carried by the right hand bucket ,A engage the right hand arm B and return the latter to the position shown in full lines in Fig. 1. Ex-

ternally of the meter casing, the rock shaft B carrles thearmv Bzwhich is link-connected to the operating arm C of a suitable register C. A second arm. B3 carried by the rock shaft B is connected by a link B* to the operatlng element D2 of the recording' mechan- 'Ihe recordin mechanisniyproper comprises a casing 1n which is secured a stud or shaft D', on the outer end of which the oscillating element D2 is journaled. Within the Vcasing D isfmounted the continuously .rotating clock-driven table D3, on which is secured a record sheet E. A record `isltraced on the record sheet E by a pen F, which may bel and is shown as of a kind commonly employed in recording instruments of this type. This pen is carried at the inner end of a rod G which is slidingly mounted in the passage D* formed in the instrument casin A spring H acting between a shoulder on the rod G and abushing D5 secured in the assageway D* tends to force the member outward through the passageway D?. A screw D", having its inner end projecting into a slot formed in the member G, prevents the member G from rotating in the assageway G. The beveled off outer en of the -member G bears against an annular cam surface formed by the edge of a cylindrical flange-like projection I carried Vby a tooth wheel I journaled on the stud D. The oscillating element D, actuated b the rock shaft B, carries a pawl d adapte to engage the adjacent tooth of the wheel I and give the latter angular advance equal to the pitch of the teeth each time the link B* is elevated. On the reverse movement of the rock shaft B, the pawl d is returned to the position 2, in position to engage a sucshown in Fi ceedin tootlgm of the wheel I when the rock shaft is again oscillated. A pawl J engages the teeth of the wheel I to prevent any backward movement of the wheel I. The foam surface 'a' slopes uniformly in both directions from the high point z" to the low ointl i2. This is clearly shown by Fig. 5 which is a developed view of the cam.

Conveniently, as shown, the wheel I has ten teeth and in a complete rotation of the wheel starting from the position shown in Figs 43 and 4, the pen will be moved from' pen combined with the continuous movementof the record sheet is to produce a zigzag record line e. ter that the successive movements of the pen produced b` the meter may be readily seen,

and counte even though the' time interval between the successive pen movements is so smalll that if the pen were merely moved back and forth inthe same path each time This line is of such a characi the two buckets filled and emptied, the record traced would be a blurred line from which it would be difficult, if not'impossible, to deci her the individual pen movements. It will e readil apparent from Fig. 3 that a computation rom the record sheet is facilitated by the fact that each peak e of the curve e represents ten oscillations of the meter rock shaft B.

While in accordancewith the provisions bf the statutes, I have illustrated and described the best forms of my invention now known to me, it will be apparent to those .skilled in the art that changes can be made 1n the form of my invention without depart-` ing from its spirit and some features can`be changed without a corresponding change of other features.

Having now described my invention, what I claim as newand desire to secure by .Letters Patent, is In combination with mechanism embodying elements designed to have a regular periodic movement, -a recording instrument adapted to graphically record such movements .and to show the relative time and speed of eaeh` such periodic movement with respect to the others, said recording instrument comprising a clock driven traveling record surface, a machine element held in constant contact with said surface sol as to mark thereon its relative movements, a rotating cam connected to move the marking element to and fro over the record surface andV actuating means whereby the periodically moving elements aforesaid impart rotative movement to the cam, said actuating means and the throw of the cam being such as to cause the marking element to traverse the record surface by separate step by step movements, each of suicient magnitude as to be clearly depicted on the record surface and to form thereon a zigzag record clearly showing each movement of the periodically moving elements.

PETER M. ANDERSON. 

